Cavolo Nero Minestrone - Another Pantry

Ingredients

• 4 tbsp olive oil
• 1 onion, chopped
• 1 carrot, peeled and chopped
• 2 celery sticks, chopped
• 3 garlic cloves, chopped
• 300g cavolo nero or Savoy cabbage (or a mix), stems removed
• 1 x 225g can plum tomatoes, drained and rinsed
• 2 x 400g borlotti or cannellini beans (or 1 can of each), drained and rinsed, or 700 g/1 lb 5 oz freshly cooked beans
• Salt and pepper
• Extra virgin olive oil, to serve